On June 23, COHERENT fell 8.42% in regular trading, trading at approximately $388.81/share, with turnover of $3.41 billion. The decline was driven by a broad selloff across the optical communication sector, compounded by the lingering impact of a bearish co-packaged optics (CPO) research report.

SemiAnalysis previously published a report indicating that large-scale CPO commercial deployment has been postponed to 2028-2029, citing core bottlenecks including low optical engine yields and high co-packaging integration complexity. The report intensified bull-bear divergence across the sector, triggering sustained selling pressure. Sector peers Corning fell 9.4% and Vishay Intertechnology declined 7.73% on the same day, reflecting significant sector-wide contagion.

COHERENT had previously rallied over 7% following the groundbreaking ceremony for its Texas-based indium phosphide factory expansion and a $50 million CHIPS Act subsidy, with NVIDIA having invested $2 billion and signed a long-term procurement agreement. The sharp reversal suggests profit-taking pressure from prior gains compounded the sector-driven downdraft.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)